Means for converting rotary into reciprocating motion.



No. 657,842. Patented Sept. ll, I900. I. H. VENN.

MEANS FOR CONVERTING ROTARY INTO REOIPROGATING MOTION.

(Application filed Oct. 21 1899.)

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(N0 Mddel.)

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No. 657,842. Patented Sept. II, "I900; I. H. VENN.

MEANS FOR CONVERTING ROTARY INTO RECIPBDGATING MOTIGN.

(Application filedflct. 21, 1899.)

(No Model.) 2 Sheets-Sheet 2.

attache/1 o UNrrnn STATES PATENT OFFICE.

ISAAC ll. VENN, OF YONKERS, NEW YORK, ASSIGNOR TOTI'IE OTIS ELEVATOR COMPANY, OF SAME PLACE.

MEANS FOR CONVERTING ROTARY INTO RECIPROCATlNG MOTION.

SPECIFICATION forming part of Letters Patent No. 657.842, dated September 11, 1900.

Application filed October 21, 1899. Serial No. 73 L353. (N model.)

To all whom it? may c nc block B will be drawn downward and the Be it known that I, ISAAC H. VENN, a citidraft on the block B Will be relaxed and the zen of the United States, residing at Yonkers, latter block will rise. If the superior speed \\"estchestercot.inty, State of New York, have is imparted to the wheel A, the action and 5 invented certain new and useful Improveeffect will be reversed.

ments in Means for Converting Rotary into One means of securing the direct driving Reciprocating Motion, of which the following of both drive-wheels from a single motor conis a specification. sists in providing the motor with a drive- The object of my invention is to convert awheel D, arranged between the wheels A A to continuous rotary into a reciprocating moand frictionally engaging both to turn them tion capable of being varied in extent; and to in opposite directions. As shown, the wheels this end my invention consists in the combi- A A are parallel, turning about a prolonganation,with two driven wheels and a cable ention of the same axis, and each is provided at gaging said wheels and formed into loops, of its inner side with an annular groove or de- 15 blocks engaged by said loops and connected pression, the faces w of which in crosssection with the object to be moved, and a single coincide with the arc of a circle. The face d rive-wheel engaging said driven wheels and of the drive-wheel D coincides with the face capable of being adjusted to vary the relaw, and the center of the wheel D is concentive speed of the driven wheels, as fully set trio with the center of the circle, which coin- 7o 20 forth hereinafter and as illustrated in the ac cides with the opposite faces 10. It therefore companying drawings, in whichfollows that when the wheel D bears at the Figure 1 is a plan viewillustrating one form center of each face to, as shown in Fig. 1, the of my improved mechanical movement. Fig. wheels A A will be driven at the same speed; 2 is a side elevation of the driving devices; but if the Wheel D is turned so as to bear near 25 Figs. 3 and 4, diagrams illustrating the arthe inner edge of the groove of one driven rangement of drive-cable and different arwheel-say the wheel A-and near the outer rangements of the blocks. edge of the groove of the other wheel then The part to be moved, as a wheel I, Fig. 3, the wheel A will increase in speed and the or a lever I, Fig. 4, is operated by the recipwheel A will decrease in speed. If the wheel 3o rocation of two blocks B B, deriving their D is swung to the opposite direction, the movements from a single motor orengine M. wheel A will be increased in speed and the The engine is provided with two driven speed of the wheel A will be decreased. It wheels A A, which are positively driven in will be evident that this change in the relareverse direction from a single shaft to in such tive speeds of the two wheels A A is effected 5 manner that the respective rates of revoluwithout any jars or sudden changes or the tion of the driven wheels may be varied as cessation of or interference with the motion desired. Around the wheelsAAandaround of the Wheels or the wheel D and that the the pulleys of the blocks B B passes a conspeed of the wheel D may be constant and tinuous cable C, the cable being formed into uniform during the movements of the blocks. 4o loops, passing from the wheel A to the block The wheel D may be driven from any suit- ]3, thence beneath the wheel A and to the able motor through the intervention of any block B, and thence down to the wheel A, so suit-able flexible gearing; but, as shown, the that it will travel with the reversely-turning wheel D is on a shaft (1, having its bearings drive-wheels and pass from one to the other. upon a frame E, carrying a motor M, the said 5 So long as the drive-wheels turn at the same frame swinging on a pivot s, the axis of which rate of speed the cable 0 travels through the is concentric with the circle coinciding with blocks B B, merely turning the pulleystherethe opposite faces 20 to. of; but if one of the drive-wheels-say the In order to insure frictional adhesion ofthe wheel Aturns at a greater speed than the driving and driven surfaces, I provide bear- I00 50 other the cable will be drawn from the wheel ings for the outer faces of the wheels A A in A and paid out from the wheel A, so that the l the shape of rollers P P, turning on studs on supports G G, pivoted to the base at their lower ends and connected by a bolt f, by tightening the nut on which the supports, with their rollers, may be drawn together to cause the wheels A A to bear more firmly on the drive-pulley. Any other suitable adjustin devices for shifting the rollers may be used.

To avoid drag or slippage of'any part of the roller-bearing faces, the latter are beveled or conical, as shown,and are adapted to corresponding annular and beveled bearing-faces u on the outer sides of the wheels A A. I thus prevent the slippage and wear which would result if the faces of the rollers and of the wheels A A were flat.

As indicated, the motor M is an electric motor, and the frame E carries a shaft with a pinion b, engaging a curved rack d, the pinion 1) being turned in any suitable way from which to shift the motor in either direction to any desired extent. Any other suitable means of adjusting the position of the drivepulley may, however, be employed.

Without limiting myself to the constructions shown, I claim 1. In an apparatus for converting rotary into reciprocating mot ion, the combination of a continuously rotating drive wheel, two driven wheels having inner annular bearingfaces transversely curved, means for changing the angle of'the drive-wheel to said wheels, a cable passing around the wheels and formed into loops and blocks engaging said loops and connected to the object to be moved, substantially as set forth.

2. The combination of two wheels A A, an endless cable passing around each wheel and forming two loops, a block in each loop, and

loops passing through said blocks, substantially as set forth.

4. The combination of the blocks, cable 0, two driven wheels provided with annular inner faces transversely curved, a drive-wheel D between said faces, and means for shifting the wheel D to carry its bearing-points to or from the aXes of the Wheels, substantially as set forth.

5. The combination with the driven wheels having annular beveled faces and an intermediate drive-wheel, of roller-bearings having conical faces bearing against said beveled faces, substantially as set forth.

6. The combination with the driven wheels having annular beveled faces and an intermediate drive-wheel, of roller-bearings having conical faces, and means for varying the pressure of the rollers against the said beveled faces of the wheels, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ISAAC I-I. VENN.

Witnesses:

JAMES S. FITCH, ARTHUR ROWLAND, 

